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Single/Single Tied

METALLIC SINGLE EXPANSION JOINT

A compact and common expansion joint designed to absorb axial thermal movements in pipelines. Its simple single-bellows construction makes it one of the most widely used joint types in piping systems.

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Single

expansion joint

The Metallic Single Expansion Joint consists of a single bellows element that compensates for expansion and contraction in the longitudinal direction of a pipe. While its primary role is to absorb axial movement, it can also accommodate limited lateral and angular deflections. Available with weld ends, fixed flanges, or loose flanges, the design can be supplied with or without internal sleeves for added flow protection.

  • Size Range (DN)

    DN50 – DN5000

  • Materials

    SS304 / SS316L / SS321 / Inconel / Hastelloy / others on request

  • Movements

    Primarily Axial; limited Lateral & Angular

  • Pressure Rating

    Up to 100 bar (higher on request)

  • Temperature Range

    –196°C to +800°C (depending on material)

Single

expansion joint

The Metallic Single Expansion Joint consists of a single bellows element that compensates for expansion and contraction in the longitudinal direction of a pipe. While its primary role is to absorb axial movement, it can also accommodate limited lateral and angular deflections. Available with weld ends, fixed flanges, or loose flanges, the design can be supplied with or without internal sleeves for added flow protection.

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  • Size Range (DN)

    DN50 – DN5000

  • Materials

    SS304 / SS316L / SS321 / Inconel / Hastelloy / others on request

  • Movements

    Primarily Axial; limited Lateral & Angular

  • Pressure Rating

    Up to 100 bar (higher on request)

  • Temperature Range

    –196°C to +800°C (depending on material)

Typical use case: Best suited for long, straight pipeline runs such as steam lines, district heating, or exhaust ducts, where controlled axial thermal expansion must be absorbed without altering the pipeline’s flow direction.

  • Exhaust and ventilation systems
  • Flue gas ducts and district heating networks
  • Steam, oil & gas piping systems
  • Power plants, petrochemical facilities, and general industrial process lines
  • Simple and cost-effective solution for axial expansion compensation
  • Compact, space-saving design with no change in flow direction
  • Multilayer bellows for high cycle life and low spring rate
  • Excellent resistance to corrosion, pressure, and temperature extremes
  • High fatigue strength and leak-tight construction
  • Minimal maintenance requirements throughout service life
  • Flexible end connection options: weld ends, fixed flanges, loose flanges
  • Available with accessories such as internal flow liners, external covers, tie rods, and limit rods
single
External Cover / shroud

protects the bellows from external damage

Flow Liner / Inner sleeve

safeguards against erosion from turbulent or abrasive flow

Tie Rod

control pressure thrust where required

Limit Rod

prevent over-extension or over-compression of the bellows

Adjustment rod

assist in length setting before installation

End Connections

weld ends, fixed flanges, or loose flanges depending on system design